Patent EA-003503-B1 (EA)
Title: Arrangement at a syringe
IPC: A61M5/32
Filed: 2000-12-11
Abstract: 1. An arrangement on a hypodermic syringe, consisting of a needle protection arrangement with a needle protector, the syringe having a container holding a rod which imparts reciprocal motion to a plunger in the container and a needle affixed to or fastenable to one of the container's end-parts, the said needle protector having the basic shape of a tube whose axial length is somewhat greater than the length of the needle, the tube serving as a needle protector with an inner radial-related cross-section shaped to correspond to or at least essentially correspond to the shape of the container's outer radial-related cross-section, the said needle protector being axially movable along the container from a needle-covering to a needle-exposing position or vice-versa, the needle protector's axial movement in relation to the container offering at least two separate, distinct positions, a first position in which the needle protector protects the needle and the needle point, the free end of the needle protector being located next to the needle point, and a second position in which the needle protector protects the needle and its point, the free end of the needle protector being located at a greater distance from the needle point while the needle protector still covers the needle and its point, the first position being devised to pose some resistance to movement of the needle protector from this position, characterized in that the said container is provided with at least one fracture scoring, and flexural stress imposed on the container and needle protector breaks and/or bends the container at the said fracture scoring. 2. An arrangement according to claim 1, characterized in that the said fracture scoring is adjacent to and constitutes the first position. 3. An arrangement according to claim 1 or 2, characterized in that the said break and/or bend are devised to form two parts or units, the needle being encapsulated inside one unit. 4. An arrangement according to claim 1 or 2, characterized in that the said break and/or bend are devised to form two parts or units, the needle being encapsulated inside one unit, and the fully depressed plunger serves as a seal for a second unit. 5. An arrangement according to claim 1, characterized in that the said second position is devised to lock the needle protector to the container. 6. An arrangement according to claim 1, characterized in that the needle protector is provided with a locking boss. 7. An arrangement according to claim 6, characterized in that the locking boss has somewhat bevelled edges. 8. An arrangement according to claim 1, characterized in that the container has a recess and/or groove with bevelled edges for the said first position. 9. An arrangement according to claim 1, characterized in that the container has a recess and/or a groove with squared-off edges for the said second position. 10. An arrangement according to claim 1, characterized in that the needle protector and container are inseparably conjoined in the said second position. 11. An arrangement according to claim 1, characterized in that a first end-part of the needle protector, facing away from the membrane, is provided with a first part of a two-part coupling element between the needle protector and the container. 12. An arrangement according to claim 11, characterized in that the said first part is comprised of an inner radially and/or axially related groove or edge. 13. An arrangement according to claim 10 or 11, characterized in that a second part of a coupling element on the container consists of a radially and/or axially related edge or grove. 14. An arrangement according to claim 12 or 13, characterized in that the said edge is located next to the said end-part. 15. An arrangement according to claims 1, 6 or 11, characterized in that the material in and dimensioning of the needle protector, at least at the first end-part, has properties enabling the needle protector to expand over the said edge. 16. An arrangement according to patent claim 1 or 6, characterized in that a first needle protector end-part, facing away from the membrane, is provided with a first part of a two-part coupling arrangement, the container having two other coupling arrangement parts axially displaced from one other. 17. An arrangement according to claim 1, characterized in that a needle protector membrane (2b) is inside the needle protector (2') at a distance of 2-10 mm, preferably 3-5 mm, from the end surface of the tube. 18. An arrangement according to claim 1 or 17, characterized in that the said membrane is fastened to the needle protector by a ring-shaped reinforcement. 19. An arrangement according to claim 1, characterized in that the said needle protector is made from a transparent plastic material. 20. An arrangement according to claim 1, characterized in that the said first position groove serves as fracture scoring when a flexural force is imposed. 21. An arrangement according to claim 20, characterized in that the said fracture scoring groove is located, in the said second position, next to the fully inserted plunger inside the container. 22. An arrangement according to claim 20, characterized in that an end-part of the needle protector is located, in the said second position, next to the said groove.